Question

**Show all your calculations with explanations of following questions **

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**Question:** **Question 1**

5 year old child requires amoxycillin suspension 125mg/5mL for an ear infection.

Express 125mg/5mL amoxycillin suspension as a % strength

A. 1.5 %

B. 2.5 %

C. 5.5 %

D. 12.5 %

**Question 2 ** Express 240mg/5mL as ratio strength

A. 1:10

B. 1:5

C. 2:100

D. 1:20

**Question 3** Express 125mg/5mL amoxycillin suspension as a % strength

A. 1.5 %

B. 2.5 %

C. 5.5 %

D. 12.5 %

**Question 4 **

Betadine sore throat gargle® (conce) contains 7.5% w/v povidone iodine. The directions are to dilute 1mL of Betadine® to 20mL of water & gargle.

• Part 1; What amount of povidone iodine is in 20mL of the diluted gargle?

A. 37.5mg

B. 75mg

C. 0.75g

D. 3.75g

Part B

Betadine Ready to Use® sore throat gargle contains 10mg/mL w/v povidone iodine. Directions are; gargle 15mL of Betadine ready to use® (RTU)

Part 2; Is the amount of povidone iodine in 15mL of Betadine ready-to-use® the same as 20mL of the diluted gargle?

**Question 5 **

An RMO asks you to prepare one litre of a 1% solution of sodium chloride. However, you only have a 5% concentrated stock solution of NaCl available to you.

How much of the 5% stock solution is required to make 1L of a 1% NaCl aqueous solution?

A. 50mL

B. 100mL

C. 200mL

D. 250mL

Start with the final concentration required in 1 litre,

Step 2; How much of the stock solution contains 10g of NaCl

**Question 6**

A doctor has prescribed clonazepam capsules. The dose is 1.5mg once a day for 10 days.

Show how you would make sufficient capsules, each weighing 450mg, for this prescription.

**Question 7**

How much NaCl is required to make 50mL of a stock solution, so that if 5mL of this stock solution is taken and diluted to 3L the final concentration is 1: 10,000 w/v?

**Question 8 **

Q. 19 If 500mL of a 1:200 solution of KCl is diluted to 1L, what is the final ratio concentration?

A. 40:1

B. 1:40

C. 400:1

D. 1:400

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